Nutrient Addition to Low pH Base Wines (L. cv. Riesling) during Yeast Acclimatization for Sparkling Wine: Its Influence on Yeast Cell Growth, Sugar Consumption and Nitrogen Usage
| Autor: | Jessy Plante, Belinda Kemp, Debra L. Inglis |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Sparkling wine production Saccharomyces cerevisiae lcsh:TX341-641 Ethanol fermentation 01 natural sciences Acclimatization 03 medical and health sciences chemistry.chemical_compound nutrients 010608 biotechnology Food science second alcoholic fermentation lcsh:RC620-627 Wine 0303 health sciences Ethanol biology 030306 microbiology food and beverages biology.organism_classification Yeast lcsh:Nutritional diseases. Deficiency diseases chemistry Diammonium phosphate base wine sparkling wine lcsh:Nutrition. Foods and food supply Food Science |
| Zdroj: | Beverages, Vol 6, Iss 1, p 10 (2020) Beverages Volume 6 Issue 1 |
| ISSN: | 2306-5710 |
| Popis: | In traditional method sparkling wine production, to carry out a successful second alcoholic fermentation, yeast are acclimatized to stressful base wine conditions. Base wines typically have low pH, low nutrient concentrations, high acid concentrations, contain sulfur dioxide (SO2), and high ethanol concentrations. Supplementing yeast during the acclimatization stages prior to second alcoholic fermentation with different nutrient sources was assessed to determine the impact on yeast growth, sugar consumption and nitrogen usage. Four treatments were tested with Saccharomyces cerevisiae strain EC1118: the control (T1) with no additives addition of diammonium phosphate (DAP) during acclimatization, (T2) Go-Ferm® inclusion during yeast rehydration (GF), (T3) and DAP + GF (T4). Results (n = 4) indicated that supplementing with DAP, GF or DAP + GF increased both the rate of sugar consumption and the concentration of viable cells during the yeast acclimatization phase in comparison to the control. Treatments supplemented with DAP + GF or DAP alone resulted in yeast consuming 228 and 220 mg N/L during the acclimatization phase, respectively. Yeast treated only with GF consumed 94 mg N/L in comparison to the control, which consumed 23 mg N/L. The time required to reach the target specific gravity (1.010) during acclimatization was significantly reduced to 57 h for yeast treated with DAP and GF, 69 h for yeast treated with DAP only and 81 h for yeast rehydrated with GF in comparison to 105 h for the control. Our results suggest that nutrients used during yeast acclimatization could have an important impact on the kinetics of second alcoholic fermentation. |
| Databáze: | OpenAIRE |
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